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Ihearmusic

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About Ihearmusic

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  • Birthday 05/12/1963

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    Perth
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    Australia

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  1. LDRs are known to add distortion specially on lower levels. That could explain the fullness..... I am a Valve guy. I like a bit of distortion to start off with. So I could imagine that a clinical DAC output could benefit from a bit of fuzziness added.
  2. Have a look here: http://undergroundsoundaudio.com/Shop/index.php/;focus=HSTPTP_cm4all_com_widgets_Shop_7128726&path=?subAction=showCategory&categoryId=35843#HSTPTP_cm4all_com_widgets_Shop_7128726 All new and with warranty.
  3. Yes, you a correct. It is officially 230V. My percentage figures relate to an outlet voltage of 240V. It will give some reference if someone that has a similar voltage for a supply. I should start a topic to ask around what the voltages on members outlets are.
  4. The amplifier for sale is the 230V version. Meixing MingDa, like any other manufacturer does not do a 240V version as most countries run 230V with very few smaller ones ( except Malaysia) being and exception. The filament voltages run a bit higher as a result of it. Around 7% higher when the voltage on the outlet is around 240V. If this is of any concern to anyone, I am happy to insert dropping resistors to reduce the filament voltage. If anyone is interested I can also upgrade to an external bias adjustment and measurement point. The amplifier for sale is brand new.
  5. Further information: Comes with 1 year warranty and 6 month on tubes SET 300B 2x8W Superb sounding, well balanced 300B SET for under AUD 2000? You are looking at it. This latest release from Meixing is a fine sounding tube amplifier. Point to point wiring and quality components throughout makes this great value. Efficient speakers are a must however and 90dB is the minimum. The impedance ideally should not drop below 6 ohm across the bandwidth. Specifications: Input voltage: 300mv Output Impedance: 4Ω, 8Ω Distortion: ≤ 1% Input impedance: 100K
  6. we are getting carried away here. We all know there are recordings available on CD and Vinyl or on streaming services that sound absolutely magnificent and then there are the other ones. What it comes down to is mostly the sound engineering and the recording equipment.
  7. Heater current to the KT88/KT120 could be an issue. KT88 require 1.6 Amps, KT 120 require 1.9Amps. This is asking an extra 1.2 Amps of your heater secondary. The transformer might be up to it or it might not. It would be great if you were able to measure the voltage on your heaters of the KT120 once installed. If there is a drop then your transformer might be not up to it depending on what is preceding the heaters. One could argue that a drop in voltage is a good thing for the live of the tubes but emission might also be reduced.
  8. Done one of these for a friend of mine. The only thing you got to watch out for is the dam sharp edges of the metal enclosure.🙂 The finished amp sounded good though.
  9. You are obliviously no tube tech. The load the way the valve sees it does not change if you have a 4 Ohm speaker out on your amplifier. The turns ratio of the primary to secondary winding will account for that and reflect back the proper load for the valve. What you are stating is true however, if you hook up a 4 Ohm speaker to the 8 Ohm speaker out on the amplifier.
  10. Still waiting for my LDR volume control. I might have to go with a quality stepped attenuator. It might a better option anyway. Last time I had and LDR here I did some testing and found high distortion on low volume setting. I did prefer my tube preamp then. But one never knows , so I am looking forward to get the latest LDR board and see whether it is worth my while.
  11. I use rod coleman filament regulators in my build. http://www.lyrima.co.uk/dhtreg/dhtRegIntro.html No noise on my 99dB speakers. Currently got brand new MingDa MC 300 A here. It uses a simple dc supply and a balancing pot. No noise!
  12. Don't tell us you left beautiful Perth for Covid riddled Switzerland!?
  13. I did build these speaker according to the plans on this website: http://tubemaniacs.blogspot.com/2011/05/tqwt-fur-philips-9710.html The "donuts" are a mechanical filter and according to the german builder supposed to flatten the frequency around the mid range. They did the opposite the vocals were shouting and when I removed them the sound was more balanced. There was a bit of a sharpness to the sound that was corrected with the foam "grill". The overall sound is very nice. sufficient bass extension for my taste and a good sound stage. I have yet to take them out of the
  14. Testing out these guys. Vintage Philips 9710 M 01 alnico in TQWT enclosure.
  15. 8 Watt Class A SS point to point wired, 16 components per channel. Capacitor multiplier power supply. Speaker driver are Fostex 126n. To this day still the only setup that had a guitar soloist jumping out of the speaker to hit me in the face🤩
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